Re: Stuck CLOSED sockets / sshd / zombies...

On Tuesday, April 08, 2014 11:33:03 am Karl Pielorz wrote:
> 
> --On 08 April 2014 09:36 -0400 John Baldwin <jhb@freebsd.org> wrote:
> 
> > Humm, it needs to build new ones with debug symbols.  If it doesn't,
> > you'll need to do 'make clean' before the other makes.  I think you
> > should be fine to do that (make clean then the command above) for those
> > directories and restart gdb without having to restart your sshd.  Please
> > also add '/usr/src/libexec/rtld-elf' to the list of directories where you
> > do this.  Then do 'detach' in gdb, exit gdb and restart it.
> 
> Ok, it hit an issue with libc (complained it couldn't find yp.h - but I 
> fixed that) and it compiled up OK then. The rest all recompiled / installed 
> OK, and I included the rtld-elf code.
> 
> > Hmmm, that is useful even though the debug symbols aren't there.  Please
> > do the rebuilds I asked for above and re-attach gdb and get 'bt' again.
> 
> Ok, that now nets:
> 
> "
> ...
> [Switching to LWP 100218]
> 0x00000008038ea89c in __error () from /lib/libthr.so.3
> (gdb) bt
> #0  0x00000008038ea89c in __error () from /lib/libthr.so.3
> #1  0x00000008038e104f in __thr_rwlock_rdlock (rwlock=0x803af9480, 
> flags=<value optimized out>, tsp=<value optimized out>)
>     at /usr/src/lib/libthr/thread/thr_umtx.c:277
> #2  0x00000008038e821c in _thr_rtld_rlock_acquire (lock=0x803af9480) at 
> atomic.h:143
> #3  0x000000080064f9a2 in rlock_acquire (lock=0x80085fe00, 
> lockstate=0x7fffffffba68) at /usr/src/libexec/rtld-elf/rtld_lock.c:197
> #4  0x00000008006498c9 in _rtld_bind (obj=0x800662000, reloff=13008) at 
> /usr/src/libexec/rtld-elf/rtld.c:675
> #5  0x00000008006470cd in _rtld_bind_start () at 
> /usr/src/libexec/rtld-elf/amd64/rtld_start.S:99
> #6  0x0000000000000246 in ?? ()
> #7  0x0000000000000000 in ?? ()
> "

Can you do 'frame 3' and ' p *lock' as well as 'frame 1' and 'p *rwlock'?

-- 
John Baldwin
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